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Search found 5874 matches

by ProPower engines
Tue Oct 15, 2019 3:20 pm
Forum: Engine Tech
Topic: Carb Floats
Replies: 8
Views: 405

Re: Carb Floats

I used a barrel valve attached to the linkage so it was able to be at a lower pressure for start up and slow driving through the pit area as most guys do. There is several adjustable regulators with a bypass that we use as well. the issue is getting the Fuel pressure right and bypassing the rest. We...
by ProPower engines
Tue Oct 15, 2019 3:13 pm
Forum: Engine Tech
Topic: Re-drilling 72 degree angle sbc heads.
Replies: 11
Views: 493

Re: Re-drilling 72 degree angle sbc heads.

What were you using to plug the 73 degree holes? I used cast iron plugs I ordered but the real issue is why?? There are sever intakes that are available dirt cheap that will work just fine. I used them for marine engines for years and they were better then the option of re-drilling for a different ...
by ProPower engines
Mon Oct 14, 2019 7:35 pm
Forum: Engine Tech
Topic: rocker stud breaking
Replies: 10
Views: 587

Re: rocker stud breaking

If the spring choice is combined with stock replacement or just stock 3/8 studs and they will break in time. If he is using stock rockers check for binding against the other studs. Rollers will flex a cheaper stud alot with a good spring. Even decent single stock OD springs will cause stud flex up t...
by ProPower engines
Sun Oct 13, 2019 3:52 pm
Forum: Engine Tech
Topic: Re-drilling 72 degree angle sbc heads.
Replies: 11
Views: 493

Re: Re-drilling 72 degree angle sbc heads.

I have modified intakes to fit the late 80's heads, and although it worked, I don't like the idea of carving up a nice manifold. I have heard of plugging and re-drilling the heads and it seems easy enough. My thought currently is to carve up an old manifold to manufacture a drill guide. I have a se...
by ProPower engines
Sun Oct 13, 2019 3:37 pm
Forum: Engine Tech
Topic: Carb Floats
Replies: 8
Views: 405

Re: Carb Floats

Doing some plannig on my newly aquired 850 Holley methanol carb. It presently has two different style floats...one is a white platic Holley brand...the other the standard style float. Can anyone recommend using the split style floats I see in some catalogs? The black floats with two seperate floats...
by ProPower engines
Thu Oct 10, 2019 4:31 pm
Forum: Engine Tech
Topic: Opinions of guides in import heads
Replies: 19
Views: 720

Re: Opinions of guides in import heads

How is Darts quality far as guides these days?Had issues with a Conquest head many yrs ago, wasnt a geometry issue. If they are the slightest bit better than the offshore piece they look promising..didnt take much to get a strong # from them. Anyways keep the good stuff coming. GM seems to still us...
by ProPower engines
Wed Oct 09, 2019 5:31 pm
Forum: Engine Tech
Topic: Opinions of guides in import heads
Replies: 19
Views: 720

Re: Opinions of guides in import heads

How do you spot a knock of Dart sbc head from an original ? Personally I have not seen an actual counterfeit but would not be surprised if they are out there. A dart head will say Dart on it and have a Dart part number. The others will have their own part number or no part number at all. And second...
by ProPower engines
Wed Oct 09, 2019 1:42 pm
Forum: Engine Tech
Topic: What ever happened to Quality control?
Replies: 9
Views: 689

Re: What ever happened to Quality control?

I have used rails with no dimples. After a year and a half that engine has not came back with any issues. I can say that the rails do move. Thanks for the reply! I have resigned myself to the fact that there is no way I can make the deadline with these issues that have taken hours from my day to ad...
by ProPower engines
Wed Oct 09, 2019 1:37 pm
Forum: Engine Tech
Topic: Spring retainers and locks - mix and match?
Replies: 12
Views: 568

Re: Spring retainers and locks - mix and match?

According to my calculations if you use a 7° retainer designed for an 8mm valve with 11/32 valve locks (8.7mm) the installed height decreases by 0.110" Regardless of the calculations the designed strength is not there. No body in the industry would try it on any engine just for the simple reason is...
by ProPower engines
Wed Oct 09, 2019 12:31 am
Forum: Engine Tech
Topic: Opinions of guides in import heads
Replies: 19
Views: 720

Re: Opinions of guides in import heads

I have a set of Small Block Chevy ones in the shop right now. Customer says they have less than 500 miles on them and I tend to believe him as clean as they are. The guides are just plain worn out. I didn't even bother to measure them because you can lift the valve an inch off the seat and it moves...
by ProPower engines
Wed Oct 09, 2019 12:24 am
Forum: Engine Tech
Topic: New pistons 73g heavier
Replies: 42
Views: 1115

Re: New pistons 73g heavier

Looking at the crank there are some pretty big drilling in the CW the one at the rear is about 1"x4" deep and the web has also had a chunk cut off it and the front one has three holes about 3/4"x4" deep Those are some deeeeeep holes ? Is the counterweight actually that big ? 1" x 4" is 400 grams :s...
by ProPower engines
Wed Oct 09, 2019 12:17 am
Forum: Engine Tech
Topic: bbc oil pump on sbc iron eagle 434
Replies: 16
Views: 730

Re: bbc oil pump on sbc iron eagle 434

Kurshuk wrote:
Tue Oct 08, 2019 7:30 pm
The sbc Iron Eagle block requires the bbc oil pump drive shaft. :D
You are referring to the OAL.
by ProPower engines
Tue Oct 08, 2019 6:27 pm
Forum: Engine Tech
Topic: New pistons 73g heavier
Replies: 42
Views: 1115

Re: New pistons 73g heavier

I would send them back!! If you compare the old to a replacement piston you got the middle of the road option as a replacement. As mentioned you can get lighter pins and maybe a tickle of the piston.OR call the piston manufactures and check out what a comparable weight piston is worth or if they can...
by ProPower engines
Tue Oct 08, 2019 4:34 pm
Forum: Engine Tech
Topic: bbc oil pump on sbc iron eagle 434
Replies: 16
Views: 730

Re: bbc oil pump on sbc iron eagle 434

The M-99 pump is the same as a m-77 but with the sm blk pick up screen location. They were better then the M-77 pump to fi6t to the pan correctly. Used them in 348-409 stuff years ago as an upgrade to the stock pump as they offered more volume.And easier on the cam drive gear then a M55hv pump. I ca...
by ProPower engines
Tue Oct 08, 2019 4:24 pm
Forum: Engine Tech
Topic: Opinions of guides in import heads
Replies: 19
Views: 720

Re: Opinions of guides in import heads

Sheesh, here it comes you know exactly what I meant. They are cheap heads I wouldnt expect miracles from them, nobody doing a serious engine (I think) would use em but they got their place. Im simply asking if your opinion is poor then what is your preferred type? That 3was not real clear to start ...